Hi Seeing you have the Auto, i take it you will have a Diesel Particulate Filter if you have this Filter which is connected to the Exhaust. You will need to use a Low Ash C 1 Oil, I use SHELL HELIX DIESEL ULTRA AFL C1 5/30 which meets specifications Of Ford&Jaguar WSS-M2C 934-B and use a Genuine Jaguar Oil Filter. As for the Auto Gearbox changing the Fluid is not a DIY JOB, i had my Transmission Fluid changed last July at MACKIE'S AUTO TRANSMISSIONS in Glasgow after having a Jaguar meeting there in March last year. My Gearbox is a Aisin Warner make and I think it cost £153 pounds they connect a Hot Flushing Machine to Two Hose Pipes,If you have the DPF try not to do a lot of short journeys if you do they say you should take the x type on a run for 1/2 to 1 hour above 30/40 miles per hour and keep the revs about 2,500/3,000 in 4th on Manuel every 3 to 4 Weeks ,Diesels are ment to be Driven coming out of a Roundabout give it some Wellie don't always keep the REVS below 2,000. I have had my x type for 2years and 8 months and have never had the DPF FULL Warning Light come on, and i always try and Fill Up with SHELL V POWER DIESEL. And always use a Genuine Jaguar Diesel Fuel Filter. Regards Tom